Mercedes W166 Wheel Carrier Rear Suspension Wheel Hub Left N/S A1663500108

The Rear Left Wheel Hub and Knuckle Assembly for Mercedes W166 is an original suspension component designed for installation on the rear axle, driver's side. As part of the Suspension Replacement Kits group, it ensures precise wheel guidance, body stability, and correct suspension geometry in Mercedes W166 SUVs. A used OEM component is a sensible choice for professional suspension repair or reconstruction when you prioritize factory fitment and predictable vehicle behavior.

Specifications and technical data

• SKU: A1663500108-4
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1663500108
• Substitutable numbers: A1663500108, A 166 350 01 08, A1663501110, A 166 350 11 10, A1664230581, A 166 423 05 81, A1664230600, A 166 423 06 00
• Location on the vehicle: Rear, Left
• Category: Suspension Component Replacement Kits

Purpose and Function in Suspension

The rear left wheel hub and knuckle assembly in the Mercedes W166 is responsible for the rigid and stable connection of the hub to the control arms and braking system components. A correctly selected part:

• maintains the correct geometry of the rear axle wheels,
• ensures stable seating of the hub and bearing,
• influences predictable vehicle handling in corners,
• limits excessive wear of tires and suspension components.

Thanks to its dedicated placement on the vehicle (rear, left side), the part is structurally adapted to the suspension architecture of the Mercedes W166, which facilitates installation and allows for the preservation of factory driving parameters.

Compatibility and Replacement Numbers

The offered hub and knuckle assembly is an original Mercedes component with an assigned OEM part number and a set of interchangeable numbers. The presence of multiple reference numbers indicates that the part may be available in different equipment versions or model years, while maintaining the same structural function.

Before purchasing, it is advisable to compare the markings with the service documentation or the removed part to confirm full compatibility. This approach minimizes the risk of mismatch and speeds up the suspension repair process.

Benefits of Using an Original Mercedes Part

Choosing an original hub and knuckle assembly for the Mercedes W166 offers a number of practical advantages:

• Factory Fitment – maintains original mounting points for control arms, shock absorber, and braking components.
• Consistency with Suspension System – compatibility with other components from the Suspension Replacement Kits group, facilitating comprehensive rear axle service.
• Predictable Vehicle Behavior – no need for modifications, allowing for the preservation of the handling characteristics designed by Mercedes engineers.

A used OEM part is a sensible compromise between repair cost and maintaining a high level of safety and driving comfort, especially in premium vehicles.

Condition, Installation, and Practical Application

The hub and knuckle assembly is offered as a used part, intended for further use after proper installation and verification by a mechanic. The component is installed in the rear left part of the suspension, utilizing factory mounting points and standard bolts and bushings.

When replacing, it is recommended to:

• check the condition of the wheel bearing and cooperating components,
• inspect for play in the connections with the control arms,
• perform wheel alignment after completing the work.

This approach allows for the full utilization of the original part's potential and restores the correct behavior of the rear axle in daily operation.

Expanding Knowledge and Selecting Suspension Parts

If you are planning a comprehensive repair or upgrade of the suspension area in your Mercedes and need other parts from the same group, such as control arms, hubs, or mounts, check the available parts in the Mercedes Suspension Replacement Kits category.

When selecting used suspension components, it is worth learning about best practices for using second-hand parts in premium cars. An article describing how to safely use used components for tuning and repairs may be helpful – you can find it here: Audi on Second-Hand Parts – Tuning and Repairs Without Quality Loss.

If you are interested in a broader context of suspension technology development and components in this brand's cars, it is also worth referring to the material on the evolution of the manufacturer's flagship models: Evolution of the Mercedes S-Class: From W140 to W222 – Innovations, Model Differences, and Mercedes Auto Parts Over the Years.